Brake-shoe.



G. H. SARGENT.

BRAKE SHOE.

APPLICATION FILED OCT. 16, 1915.

Patented Dec. 28, I915.

, of contact with the railand when the wear GEORGE H. SARGENT, OF-CHICAGO, ILLINOIs.

BRAKE-SHOE.

Specification of Letters Patent.

Patented Dec. 28, 1915.

' Application filed October 16, 1915. Serial No. 56,186.

To all whom it may concern Be it known that I, Gnonon H. SARGENT, acitizen of the llnited States. and resident of Chicago, in the county ofCook and State of Illinois. have invented certainnew and usefulImprovements in BrakeShoes, of which the following is a specification.

My invention relates to brake shoes, and has particular reference to atruing or dressing brake shoe.

It is well known that after continued service, the wheels employed undercars or locomotives becom. worn at the direct point becomes pronouncedsuch wheels are a menace to tratiic, being likely to cause accidents. Acommon remedy is to remove the wheel and turn the thread to the propercontour. It is also common to employ dressing shoes. z 6., shoes havinginserts of hard material, such as corundum, this grinding materialserving to remove the highest points of the wheel, with the idea ofrestoring the wheel to its proper contour. It has been found. however.that such shoes do not act in this manner; on the contrary, the shoesthemselves will become worn at the high points in the wheel, and thewheel will not at any time be restored to its original contour.

I have conceived the idea of providing a dressing shoe which will havethe usual corundum insert. which insert shall be movable across the faceof the shoe to provide differently disposed wearing surfaces. to the endthat the wheel may be ground to the proper degree without thepossibility of a change in the contour of the shoe at the same time thewheel is being ground.

The invention will be more readily understood by reference to theaccompanying drawings, -wherein- Figure 1 is a face View of a brake shoeconstructed in accordance with my invention; Fig. 2 is a longitudinalsectional view through the construction shown in Fig. 1;

Fig. 3 is a section on the line 3-3 of Fig.'

2: Fig. 4 is a perspective view of one of the inserts in the face of theshoe, and Fig. 5 is a perspective view of one of the inserts employed inthe thread of the shoe.

As indicated in the drawings, the shoe. which is indicated by thenumeral 10, may be of the usual cast metal construction and is providedin its face and located transversely thereof with recesses 11, thesereas indicated by the numeral 14. Inasmuch as this may be more readilyhandled and adpisted when confined, I have located the grinding materialwithin a cup or container 15, of pressed or cast metal. the sides of'which are tapered to correspond to the taper of the recesses 11 in theface of the shoe. It will be noted that these grinding elements are ofless length than the width of the shoe, as best shown in Fig. 1, and,therefore, the same may be located in different transverse positions onthe face of the shoe. This enables the use of the dressing shoe 1n suchmanner that the wheel may be ground at any point. When first set on aworm wheel the grinding elements will be located at the high point ofthe wheel. However, as wear takes place between the shoe and the wheel,the grinding element will tend to conform somewhat to the uneven contourof the-wheel. At that point the grinding elements are shifted transversely, this being accomplished by loosening the containers 15 from therecesses, a notch 16 being provided in the lower edge of the containerwithin which a tool may be inserted to aid in removing the device fromthe recess.

The grinding means for the flange are similar in construction to thosefor the tread of the wheel. The grinding material 17 is contained withina cup 18. which is fitted within the recess 13. In this instance therecess 13 extends entirely through the flange portion 12 of the shoe,and the grinding element may be driven out from the back of the shoe. I

By the use of the construction described, I am enabled to provide adressing shoe which is etlicient in all conditions of wear of the shoe.The adjustment to secure the proper grinding action may be made verysimply without necessarily removing the shoe from its holding means. Iurthermore, the cost of construction is slight. and, there fore, renewalexpense is slight.

' The grinding devices 17, which a, a-

. plied jto ;the,- fi ange, are not adapted for lateral adjustment, butit is intended that,

' -:the grinding material be disposed in container in such manner thatthe con- .tainers may be shifted in the sockets to present a wearingsurface at another point, or

' that the devices may bechanged to provide others in which the grindingshall take I 10 7 place at a different point. I claim:

In a brake shoe of'the class described, the combination .of a shoehaving a plurality of slots therein "and grinding elements seated insaid slots, said grindingelements being of a length less than the widthof the shoe and being movable in said slots, substantially as described.

2; In a brake slice, the combination of a body portion. having "aplurality of transverse slots "thereinand grinding devices re- .movablyseated in said slots and adjustable across. the face of said shoe,substantially as described.

i 3. In a brake shoe,,the combination of a body portion having aplurality of transverse, vertically tapered slots therein, and grindingdevices located in said slots and transversely adjustable across theface of said shoe, substantially as described.

4. In a device of the class described, the

"combination of a shoe having a plurality of movable longitudinally ofthe slots and I,

across the face of the shoe, and grinding devices located in theapertures in the flange portion of said shoe, substantially asdescribed. a t Y .6. In a brake shoe, the combination of'a flangeportion having a plurality of recesses therein and removable andadjustable grinding devices mounted in said recesses, sub stantially asdescribed,

Signed at Chicago, Illinois, this 14th day of October, 1915.

GEORGE H. SARGENT. Witnesses CHAS. T. MURRAY, T. D. BUTLER.

